Replace liboqs SPHINCS+ with SLH-DSA in certificate layer#10261
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Frauschi wants to merge 1 commit intowolfSSL:masterfrom
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Replace liboqs SPHINCS+ with SLH-DSA in certificate layer#10261Frauschi wants to merge 1 commit intowolfSSL:masterfrom
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Replace the liboqs-based pre-standardization SPHINCS+ implementation with the native FIPS 205 SLH-DSA implementation across the certificate/ASN.1/X.509 layers. All liboqs SPHINCS+ code is removed. This enables SLH-DSA for certificate chain authentication (CA certificates signed with SLH-DSA, certificate verification). TLS 1.3 entity authentication via CertificateVerify with SLH-DSA will be added in a follow-up PR. Follows RFC 9909 (X.509 Algorithm Identifiers for SLH-DSA). Changes: - New DER codec for SLH-DSA (PrivateKeyDecode, PublicKeyDecode, KeyToDer, PrivateKeyToDer, PublicKeyToDer) with RFC 9909 compliant encoding (bare OCTET STRING, 4*n bytes = SK.seed || SK.prf || PK.seed || PK.root, no nested wrapper) and OID auto-detection across all six SHAKE parameter sets. - 12 standardized NIST OIDs (6 SHA2 + 6 SHAKE) per RFC 9909. OID collision mechanism cleaned up since NIST OIDs don't collide. - Complete ASN.1 layer replacement (~500 lines in asn.c) and X.509 public-key handling in x509.c. - SHA2-SLH-DSA OIDs are recognized but the native backend is SHAKE-only; Private/PublicKeyDecode and ConfirmSignature return NOT_COMPILED_IN for SHA2 variants so callers get an informative error instead of a generic parse failure. - wc_GetKeyOID selects its placeholder parameter from whatever SHAKE variant is compiled in, so auto-detect works when specific variants (e.g. SHAKE128F) are disabled. - wc_SlhDsaKey_PublicKeyDecode saves and restores key->params and *inOutIdx on ImportPublic failure, matching PrivateKeyDecode. - DER round-trip and on-disk decode tests (bench_slhdsa_shake*_key.der fixtures regenerated with wolfSSL's own encoder, guaranteed RFC 9909 compliant) guard against future encoding drift. - SLH-DSA test cert chain generated with OpenSSL 3.5. - DYNAMIC_TYPE_SPHINCS = 98 kept as RESERVED with a tombstone comment for ABI stability; new code should use DYNAMIC_TYPE_SLHDSA (107). - All build system / IDE project files updated; SPHINCS+ sources, headers, and test data removed.
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Replace the liboqs-based pre-standardization SPHINCS+ implementation with the native FIPS 205 SLH-DSA implementation across the certificate/ASN.1/X.509 layers. All liboqs SPHINCS+ code is removed.
This enables SLH-DSA for certificate chain authentication (CA certificates signed with SLH-DSA, certificate verification). TLS 1.3 entity authentication via CertificateVerify with SLH-DSA will be added in a follow-up PR.
Follows RFC 9909 (X.509 Algorithm Identifiers for SLH-DSA).
Changes:
If #9843 is merged ahead of this (probably the case), then this PR will be updated to properly incorporate the SHA2-based SLH-DSA variants.